38A
ANALYTICAL
CHEMISTRY
THE BASIC TOOLS FOR EVERY BIOCHEMICAL LABORATORY
Parr O X Y G E N
BOMB
3îocÂemiccU 9ïiatnM+nestti ELECTROPHORESIS APPARATUS The large Aminco-Stern research model (left) is intended for heavy work output, using a large variety of sample volumes. The Aminco Portable Apparatus (not shown) is designed for routine research and clinical use on a smaller scale. Both models constitute complete electrophoresis laboratories in single, compact units. They combine precise schlieren optics, automatic refrigeration, high-voltage supply, and rapid dialysis facilities. Accessories available for macro-preparative work, adsorption chromatography, diffusion measurements, and routine clinical analysis. BULLETINS 2175-B and 2281-B
WARBURG MANOMETRIC APPARATUS Series 1300 Plain Jacket
Series 1200 Adiabatic Jacket
T
HESE PARR Calorimeters, improved in
These greatly improved instruments represent the latest developments in manometric apparatus. The Aminco-Lardy Rotary Warburg Unit (right) can be rotated so that any manometer can be brought before the operator while he remains in a fixed position. Manometers may be read while in motion, or stopped individually. The Dual-shaker Apparatus (not shown) embodies two independent shaking mechanisms. Both types have wobble-free manometers, and are available in heated and refrigerated models. BULLETIN 2185-B
several respects for greater convenience and efficiency,
either
single
or
can be furnished
double
valve
PARR
with
LIGHT-SCATTERING APPARATUS
self-
thermal leakage t o a minimum. Radiation cor-
This compact and sensitive indicating and recording microphotometer directly measures from 20 micromierolumens to 20 lumens of scattered light in five decade ranges. It has internal electronic stabilization, builtin d-c. amplifier, removable slit and optical systems, and outlet for recordei operation. Completely a-c. operated.
rection must be applied using the procedure
BULLETIN 2182-B
sealing oxygen bombs. The Series 1300, plain jacket calorimeter, has a non-metallic insulating jacket which holds
specified in A.S.T.M.
Designation:
D27I-48.
The Series 1200, A d i a b a t i c Calorimeter, requires no radiation corrections thereby
per-
mitting rapid tests with minimum calculations.
For
complete
PARR
Dealer
details, or
write
ask
your
direct
to
factory.
HIGH-SPEED ANGLE CENTRIFUGE A reliable, safe, and modern high-speed centrifuge with unique balancing mechanism that assures greater speed and safety. R.C.F. developed: 25,000 g at full speed of 14,000 rpm. Tube angle 3 2 ° . Interchangeable standardized rotors and maximum flexibility. Integral control panel and guard. Minimum servicing and low-cost maintenance.
AMERICAN INSTRUMENT CO., INC.
Parr INSTRUMENT COMPANY EST.
o(a/Hyuz6&î&\AiooiMmen£&—
IB'J'J
'" -ERS OF (.AIORIMETERS AND I'RFSSURE REACTION E0UIPMl.N1
SILVER SPRING, M D . — I N
METROPOLITAN
W A S H I N G T O N , D. C.
